250Ninja/GPX250R

500Ninja, GPZ500S

250Ninja, GPX250R. Model name: EX250-F17

The smallest Ninja, EX250Ninja in the US and GPX250R other places. Though the  250Ninja  is falls in the category of smaller sports bike but it

provides best value for riders for its high tech engine, lightweight, and sportbike styles. Above all it is more affordable. Kawasaki ninja 250R comes with liquid cooled, inline twin cylinder 4 stroke engine having dual overhead cams and 4 valves. It has 6-speed transmission, 14,000 rpm which gives a exciting ride.

Sport bikes

ZX12R

ZX9R (2003)

The ZX12R, Kawasaki's flagship  have been around sins 2000, had an major update in 2002, and are still the worlds fastest and strongest motorcycle in 2004. For 2004, the ZX-12R's power delivery is further improved with the addition of sub throttles to the fuel injection system, and new radial-mounted front disc brakes enhance braking feel. Other changes are slightly different graphics.

2003	2004
The 2004 model looks just like the 2003 model except for the front brakes. (Picture above)

The ZX-12R's 16-valve, DOHC, 1199cc inline-four engine produces ample horsepower at all rpm range, and for 2004, a sub throttle assembly has been added to the Nippon-Denso electronic fuel-injection system to smooth power delivery. The ZX-12R system utilizes 46mm throttle bodies with injector tips spraying fuel directly at the intake valves, however, sudden changes in throttle opening can sometimes cause hesitation and inconsistent throttle response. The new sub throttles are placed further up the intake tract and are controlled by the electronic Engine Control Unit (ECU), which automatically adjusts air intake to more precisely match engine demand. The result is a smooth flow of power at all throttle positions, similar to that of constant velocity carburettor designs, with the efficiency of modern fuel injection. 

Some interesting ZX12 sites!!

The ZX-12R is supported by an aluminium monocoque frame with a cast steering head welded to pressed plates, then welded to a cast midsection that incorporates the battery case as a stressed member. The ZX-12R's light steering and planted feel is due to a steep steering-head angle. 
A 43mm inverted cartridge fork with adjustable preload, compression and rebound damping also contribute to the ZX-12R's superb turning characteristics. Adjustability of the fork comes from a steeples damping adjuster, which incorporates a check valve for improved damping performance. 

Kawasaki's patented UNI-TRAK® rear suspension uses a linkage system to progressively increase the damping and spring rate as the suspension is compressed. Like the fork, the shock uses a steeples compression and rebound damping adjuster.
Both ends of the ZX-12R wear 17-inch wheels with hexagonal tri-spokes. The six inch-wide rear rim is fitted with an ultra-wide 200/50 tire for excellent traction – a must for a bike as powerful as the ZX-12R. 

Braking is accomplished with new radial-mounted, opposed four-piston callipers gripping large 320mm diameter dual front disc brakes and a single 230mm rear disc brake. First introduced on Kawasaki's own NINJA ZX-6R and ZX-6RR sportbikes, the radial front brake design utilizes mounting points at both the top and bottom of the calliper, with the mounting bolts inserted through the rear of the calliper instead of the side or front as on conventional designs. This racing-inspired setup makes the calliper more rigid to improve brake feel over a wider range of operation.